This can be fixed relatively easily with TES5Edit. In either case, if the error being shows is consistent, you have a vanilla navmesh that's been deleted.
You accidentally merged two navmeshes the CK listed as islands. You deleted a vanilla navmesh using the cell window in the CK.Ģ. The errors will be listed in the EditorWarnings.txt file in your Skyrim folder.ġ.
PATHFINDING: NavMesh in cell Pinewood (Tamriel) should be refinalized, there are navmesh bounds missing
